<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./js/vue.js"></script>
</head>

<body>
    <div id="app">
        <input type="text" v-model="msg">
        <!-- 使用过滤器 -->
        {{msg|upperCase|asterisk}}
    </div>
    <div id="app2">
        <input type="text" v-model="msg">
        <!-- 使用过滤器 -->
        {{msg|upperCase|asterisk}}
    </div>
</body>

<script>
    var app = new Vue({
        el: "#app",
        data: {
            msg: ''
        },
        filters: {
            upperCase: function(val){
                return val.toUpperCase();
            },
            asterisk:function(val){
                var reg = /\d/g;
                return val.replace(reg,'*');
            }
        }
    });
    var app2 = new Vue({
        el: "#app2",
        data: {
            msg: ''
        }
    })
</script>

</html>